Open Access. Powered by Scholars. Published by Universities.®

Digital Commons Network™

Open Access. Powered by Scholars. Published by Universities.®

Faculty Publications

Discipline
Institution
Keyword
Publication Year
File Type

Articles 1081 - 1110 of 2335

Full-Text Articles in Entire DC Network

Species Are Not Most Abundant In The Centre Of Their Geographic Range Or Climatic Niche, Tad Dallas, Robin R. Decker, Alan Hastings Dec 2017

Species Are Not Most Abundant In The Centre Of Their Geographic Range Or Climatic Niche, Tad Dallas, Robin R. Decker, Alan Hastings

Faculty Publications

© 2017 John Wiley & Sons Ltd/CNRS The pervasive idea that species should be most abundant in the centre of their geographic range or centre of their climatic niche is a key assumption in many existing ecological hypotheses and has been declared a general macroecological rule. However, empirical support for decreasing population abundance with increasing distance from geographic range or climatic niche centre (distance–abundance relationships) remains fairly weak. We examine over 1400 bird, mammal, fish and tree species to provide a thorough test of distance–abundance relationships, and their associations with species traits and phylogenetic relationships. We failed to detect consistent …

Go to article

The Phylogeny Of Heliconia (Heliconiaceae) And The Evolution Of Floral Presentation, William J.D. Iles, Chodon Sass, Laura Lagomarsino, Gracie Benson-Martin, Heather Driscoll, Chelsea D. Specht Dec 2017

The Phylogeny Of Heliconia (Heliconiaceae) And The Evolution Of Floral Presentation, William J.D. Iles, Chodon Sass, Laura Lagomarsino, Gracie Benson-Martin, Heather Driscoll, Chelsea D. Specht

Faculty Publications

© 2016 Elsevier Inc. Heliconia (Heliconiaceae, order Zingiberales) is among the showiest plants of the Neotropical rainforest and represent a spectacular co-evolutionary radiation with hummingbirds. Despite the attractiveness and ecological importance of many Heliconia, the genus has been the subject of limited molecular phylogenetic studies. We sample seven markers from the plastid and nuclear genomes for 202 samples of Heliconia. This represents ca. 75% of accepted species and includes coverage of all taxonomic subgenera and sections. We date this phylogeny using fossils associated with other families in the Zingiberales; in particular we review and evaluate the Eocene fossil Ensete oregonense. …

Go to article

Comparison Of Five Methods For Parameter Estimation Under Taylor's Power Law, Peijian Shi, David A. Ratkowsky, Ningtao Wang, Yang Li, Lei Zhao, Gadi V.P. Reddy, Bai Lian Li Dec 2017

Comparison Of Five Methods For Parameter Estimation Under Taylor's Power Law, Peijian Shi, David A. Ratkowsky, Ningtao Wang, Yang Li, Lei Zhao, Gadi V.P. Reddy, Bai Lian Li

Faculty Publications

Taylor's power law (TPL) can be applied to the mean-variance relationship for various quantities, e.g., population densities over space and time, biomass of plants in the growth processes, developmental rates and growth rates of arthropods at different temperatures, etc. When TPL holds in the grouped data (e.g., the biomass of plants at different investigation times with limited replicates at each investigation), we must consider the heterocedasticity when carrying out the parameter estimation for a given mathematical model. We propose two new target functions based on TPL and attempt to more accurately estimate the model parameter(s). By capturing the mean-variance relationship, …

Go to article

Effects Of Isolation On Ant Assemblages Depend On Microhabitat, Xuan Chen, Benjamin Adams, Michael Layne, Christopher Swarzenski, David Norris, Linda Hooper-Bui Dec 2017

Effects Of Isolation On Ant Assemblages Depend On Microhabitat, Xuan Chen, Benjamin Adams, Michael Layne, Christopher Swarzenski, David Norris, Linda Hooper-Bui

Faculty Publications

How isolation affects biological communities is a fundamental question in ecology and conservation biology. Local diversity (α) agnd regional diversity (γ) are consistently lower in insular areas. The pattern of species turnover (β diversity) and the influence of isolation on competitive interactions are less predictable. Differences in communities across microhabitats within an isolated patch could contribute to the variability in patterns related to isolation. Trees form characteristically dense and sparse patches (low vs. high isolation) in floating marshes in coastal Louisiana, and canopy and root areas around these trees could support distinct ant communities. Consequently, trees in floating marshes provide …

Go to article

Cenozoic Sedimentary Records Of Climate-Tectonic Coupling In The Western Himalaya, Peter D. Clift Dec 2017

Cenozoic Sedimentary Records Of Climate-Tectonic Coupling In The Western Himalaya, Peter D. Clift

Faculty Publications

© 2017, The Author(s). ᅟ: Sedimentary archives in the Himalayan foreland basin and Indus submarine fan provide the most detailed records of how changing monsoon strength may have affected erosion and the development of tectonic structures in the western Himalaya during the Neogene. Muscovite Ar-Ar ages show that fast exhumation of the Greater Himalaya was earlier in the west (20–35 Ma) than in the central Himalaya (10–25 Ma), probably driven by progressive lithospheric slab tearing that caused both rock uplift and an intensified summer monsoon to start earlier in the western Himalaya. Rates of exhumation reduced after ~ 17 Ma …

Go to article

Controls On Modern Erosion And The Development Of The Pearl River Drainage In The Late Paleogene, Chang Liu, Peter D. Clift, Andrew Carter, Philipp Böning, Zhaochu Hu, Zhen Sun, Katharina Pahnke Dec 2017

Controls On Modern Erosion And The Development Of The Pearl River Drainage In The Late Paleogene, Chang Liu, Peter D. Clift, Andrew Carter, Philipp Böning, Zhaochu Hu, Zhen Sun, Katharina Pahnke

Faculty Publications

© 2017 Elsevier B.V. The Pearl River and its tributaries drains large areas of southern China and has been the primary source of sediment to the northern continental margin of the South China Sea since its opening. In this study we use a combination of bulk sediment geochemistry, Nd and Sr isotope geochemistry, and single grain zircon U-Pb dating to understand the source of sediment in the modern drainage. We also performed zircon U-Pb dating on Eocene sedimentary rocks sampled by International Ocean Discovery Program (IODP) Expedition 349 in order to constrain the source of sediment to the rift before …

Go to article

Federalism And Constitutional Criminal Law, Brenner M. Fissell Dec 2017

Federalism And Constitutional Criminal Law, Brenner M. Fissell

Faculty Publications

A vast body of constitutional law regulates the way that police investigate crimes and the way that criminal cases are handled at trial. The Supreme Court has imposed far fewer rules regarding what can be a crime in the first place, how it must be defined, and how much it can be punished. What explains this one-sided favoring of “procedure” over “substance?” This Article aims to unearth and assess the justification that the Court itself most often uses when it refuses to place constitutional limits on substantive criminal law: federalism. While the Court often invokes the concept to rationalize its …

Go to article

Examining The Relationship Between Park Neighborhoods, Features, Cleanliness, And Condition With Observed Weekday Park Usage And Physical Activity: A Case Study, Kerry Hamilton, Andrew T. Kaczynski, Melissa L. Fair, Lucie Levesque Nov 2017

Examining The Relationship Between Park Neighborhoods, Features, Cleanliness, And Condition With Observed Weekday Park Usage And Physical Activity: A Case Study, Kerry Hamilton, Andrew T. Kaczynski, Melissa L. Fair, Lucie Levesque

Faculty Publications

Background. Little research has comprehensively explored how park features, quality indicators, and neighborhood environments are associated with observed park usage and physical activity (PA). This case study examined whether weekday park usage and PA differ by neighborhood type, across numerous categories of park features, and according to park feature condition and cleanliness. Methods. Direct observation was used to capture the number of users and PA levels within 143 park features in 6 parks (3 urban, 3 suburban) over the course of six weeks. Audits of park environments assessed the type, condition, and cleanliness of all features and amenities. …

Go to article

A Communal Catalogue Reveals Earth's Multiscale Microbial Diversity, Luke R. Thompson, Jon G. Sanders, Daniel Mcdonald, Amnon Amir, Joshua Ladau, Kenneth J. Locey, Robert J. Prill, Anupriya Tripathi, Sean M. Gibbons, Gail Ackermann, Jose A. Navas-Molina, Stefan Janssen, Evguenia Kopylova, Yoshiki Vázquez-Baeza, Antonio González, James T. Morton, Siavash Mirarab, Zhenjiang Zech Xu, Lingjing Jiang, Mohamed F. Haroon, Jad Kanbar, Qiyun Zhu, Se Jin Song, Tomasz Kosciolek, Nicholas A. Bokulich, Joshua Lefler, Colin J. Brislawn, Gregory Humphrey, Sarah M. Owens, Jarrad Hampton-Marcell, Donna Berg-Lyons, Valerie Mckenzie, Noah Fierer Nov 2017

A Communal Catalogue Reveals Earth's Multiscale Microbial Diversity, Luke R. Thompson, Jon G. Sanders, Daniel Mcdonald, Amnon Amir, Joshua Ladau, Kenneth J. Locey, Robert J. Prill, Anupriya Tripathi, Sean M. Gibbons, Gail Ackermann, Jose A. Navas-Molina, Stefan Janssen, Evguenia Kopylova, Yoshiki Vázquez-Baeza, Antonio González, James T. Morton, Siavash Mirarab, Zhenjiang Zech Xu, Lingjing Jiang, Mohamed F. Haroon, Jad Kanbar, Qiyun Zhu, Se Jin Song, Tomasz Kosciolek, Nicholas A. Bokulich, Joshua Lefler, Colin J. Brislawn, Gregory Humphrey, Sarah M. Owens, Jarrad Hampton-Marcell, Donna Berg-Lyons, Valerie Mckenzie, Noah Fierer

Faculty Publications

© 2017 Macmillan Publishers Limited, part of Springer Nature. All rights reserved. Our growing awareness of the microbial world's importance and diversity contrasts starkly with our limited understanding of its fundamental structure. Despite recent advances in DNA sequencing, a lack of standardized protocols and common analytical frameworks impedes comparisons among studies, hindering the development of global inferences about microbial life on Earth. Here we present a meta-analysis of microbial community samples collected by hundreds of researchers for the Earth Microbiome Project. Coordinated protocols and new analytical methods, particularly the use of exact sequences instead of clustered operational taxonomic units, enable …

Go to article

Hospitalization Rates And Predictors Of Rehospitalization Among Individuals With Advanced Cancer In The Year After Diagnosis, Robin Whitney, Janice Bell, Daniel Tancredi, Patrick Romano, Richard Bold, Jill Joseph Nov 2017

Hospitalization Rates And Predictors Of Rehospitalization Among Individuals With Advanced Cancer In The Year After Diagnosis, Robin Whitney, Janice Bell, Daniel Tancredi, Patrick Romano, Richard Bold, Jill Joseph

Faculty Publications

PurposeAmong individuals with advanced cancer, frequent hospitalization increasingly is viewed as a hallmark of poor-quality care. We examined hospitalization rates and individual- and hospital-level predictors of rehospitalization among individuals with advanced cancer in the year after diagnosis.MethodsIndividuals diagnosed with advanced breast, colorectal, non–small-cell lung, or pancreatic cancer from 2009 to 2012 (N = 25,032) were identified with data from the California Cancer Registry (CCR). After linkage with inpatient discharge data, multistate and log-linear Poisson regression models were used to calculate hospitalization rates and to model rehospitalization in the year after diagnosis, accounting for survival.ResultsIn the year after diagnosis, 71% of …

Go to article

Habitat Association Predicts Genetic Diversity And Population Divergence In Amazonian Birds, Michael G. Harvey, Alexandre Aleixo, Camila C. Ribas, Robb T. Brumfield Nov 2017

Habitat Association Predicts Genetic Diversity And Population Divergence In Amazonian Birds, Michael G. Harvey, Alexandre Aleixo, Camila C. Ribas, Robb T. Brumfield

Faculty Publications

© 2017 by The University of Chicago. The ecological traits of organisms may predict their genetic diversity and population genetic structure and mediate the action of evolutionary processes important for speciation and adaptation. Making these ecological-evolutionary links is difficult because it requires comparable genetic estimates from many species with differing ecologies. In Amazonian birds, habitat association is an important component of ecological diversity. Here, we examine the link between habitat association and genetic parameters using 20 pairs of closely related Amazonian bird species in which one member of the pair occurs primarily in forest edge and floodplains and the other …

Go to article

Molecular Systematics Of Targeted Flat Sedges (Cyperus, Cyperaceae) Of The Americas, Christopher S. Reid, Vinson P. Doyle, J. Richard Carter, Yalma Vargas-Rodriguez, Lowell E. Urbatsch Nov 2017

Molecular Systematics Of Targeted Flat Sedges (Cyperus, Cyperaceae) Of The Americas, Christopher S. Reid, Vinson P. Doyle, J. Richard Carter, Yalma Vargas-Rodriguez, Lowell E. Urbatsch

Faculty Publications

Background and aims – Cyperus is a large, ecologically diverse, and important sedge genus. Recent systematic work resolved problems with generic delimitation and implicated C4 photosynthesis as a possible key innovation spurring diversification. Our research addressed several systematic, taxonomic, and biogeographic questions at the levels of species, species groups, and taxonomic sections. By targeting American taxa, this work helped fill a geographic sampling gap. Methods – Phylogenetic relationships of 121 ingroup samples representing 93 taxa were inferred using both Bayesian and maximum likelihood approaches in a multi-locus framework with nucleotide data from nuclear ITS, and plastid markers matK, ndhF, rpl32-trnL(UAG), …

Go to article

Climate Process Team On Internal Wave-Driven Ocean Mixing, Jennifer A. Mackinnon, Zhongxiang Zhao, Caitlin B. Whalen, Amy F. Waterhouse, David S. Trossman, Oliver M. Sun, Louis C. St. Laurent, Harper L. Simmons, Kurt Polzin, Robert Pinkel, Andrew Pickering, Nancy J. Norton, Jonathan D. Nash, Ruth Musgrave, Lynne M. Merchant, Angelique V. Melet, Benjamin Mater, Sonya Legg, Willima G. Large, Eric Kunze, Jody M. Klymak, Markus Jochum, Steven R. Jayne, Robert W. Hallberg, Stephen M. Griffies, Steve Diggs, Gokhan Danabasoglu, Eric P. Chassignet, Maarten C. Buijsman, Frank O. Bryan, Bruce P. Briegleb, Andrew Barna, Brian K. Arbic, Joseph K. Ansong, Matthew H. Alford Nov 2017

Climate Process Team On Internal Wave-Driven Ocean Mixing, Jennifer A. Mackinnon, Zhongxiang Zhao, Caitlin B. Whalen, Amy F. Waterhouse, David S. Trossman, Oliver M. Sun, Louis C. St. Laurent, Harper L. Simmons, Kurt Polzin, Robert Pinkel, Andrew Pickering, Nancy J. Norton, Jonathan D. Nash, Ruth Musgrave, Lynne M. Merchant, Angelique V. Melet, Benjamin Mater, Sonya Legg, Willima G. Large, Eric Kunze, Jody M. Klymak, Markus Jochum, Steven R. Jayne, Robert W. Hallberg, Stephen M. Griffies, Steve Diggs, Gokhan Danabasoglu, Eric P. Chassignet, Maarten C. Buijsman, Frank O. Bryan, Bruce P. Briegleb, Andrew Barna, Brian K. Arbic, Joseph K. Ansong, Matthew H. Alford

Faculty Publications

The study summarizes recent advances in our understanding of internal wave–driven turbulent mixing in the ocean interior and introduces new parameterizations for global climate ocean models and their climate impacts.

Go to article

A Communal Catalogue Reveals Earth's Multiscale Microbial Diversity, Luke R. Thompson, Jon G. Sanders, Daniel Mcdonald, Amnon Amir, Joshua Ladau, Kenneth J. Locey, Robert J. Prill, Anupriya Tripathi, Sean M. Gibbons, Gail Ackermann, Jose A. Navas-Molina, Stefan Janssen, Evguenia Kopylova, Yoshiki Vazquez-Baeza, Antonio Gonzalez, James T. Morton, Siavash Mirarab, Zhenjiang Zech Xu, Lingjing Jiang, Mohamed F. Haroon, Jad Kanbar, Qiyun Zhu, Se Jin Song, Tomasz Kosciolek, Nicholas A. Bokulich, Joshua Lefler, Colin J. Brislawn, Gregory Humphrey, Sarah M. Owens, Jarrad Hampton-Marcell, Donna Berg-Lyons, Valerie Mckenzie, Noah Fierer, Jed A. Fuhrman, Aaron Clauset, Rick L. Stevens, Ashley Shade, Katherine S. Pollard, Kelly D. Goodwin, Janet K. Jansson, Jack A. Gilbert, Rob Knight, The Earth Microbiome Project Consortium Nov 2017

A Communal Catalogue Reveals Earth's Multiscale Microbial Diversity, Luke R. Thompson, Jon G. Sanders, Daniel Mcdonald, Amnon Amir, Joshua Ladau, Kenneth J. Locey, Robert J. Prill, Anupriya Tripathi, Sean M. Gibbons, Gail Ackermann, Jose A. Navas-Molina, Stefan Janssen, Evguenia Kopylova, Yoshiki Vazquez-Baeza, Antonio Gonzalez, James T. Morton, Siavash Mirarab, Zhenjiang Zech Xu, Lingjing Jiang, Mohamed F. Haroon, Jad Kanbar, Qiyun Zhu, Se Jin Song, Tomasz Kosciolek, Nicholas A. Bokulich, Joshua Lefler, Colin J. Brislawn, Gregory Humphrey, Sarah M. Owens, Jarrad Hampton-Marcell, Donna Berg-Lyons, Valerie Mckenzie, Noah Fierer, Jed A. Fuhrman, Aaron Clauset, Rick L. Stevens, Ashley Shade, Katherine S. Pollard, Kelly D. Goodwin, Janet K. Jansson, Jack A. Gilbert, Rob Knight, The Earth Microbiome Project Consortium

Faculty Publications

Our growing awareness of the microbial world's importance and diversity contrasts starkly with our limited understanding of its fundamental structure. Despite recent advances in DNA sequencing, a lack of standardized protocols and common analytical frameworks impedes comparisons among studies, hindering the development of global inferences about microbial life on Earth. Here we present a meta-analysis of microbial community samples collected by hundreds of researchers for the Earth Microbiome Project. Coordinated protocols and new analytical methods, particularly the use of exact sequences instead of clustered operational taxonomic units, enable bacterial and archaeal ribosomal RNA gene sequences to be followed across multiple …

Go to article

A Meta-Analysis Of Prosocial Media On Prosocial Behavior, Aggression, And Empathic Concern: A Multidimensional Approach, Sarah M. Coyne, Laura M. Padilla-Walker, Hailey G. Holmgren, Emilie J. Davis, Kevin M. Collier, Madison K. Memmott-Elison, Alan J. Hawkins Oct 2017

A Meta-Analysis Of Prosocial Media On Prosocial Behavior, Aggression, And Empathic Concern: A Multidimensional Approach, Sarah M. Coyne, Laura M. Padilla-Walker, Hailey G. Holmgren, Emilie J. Davis, Kevin M. Collier, Madison K. Memmott-Elison, Alan J. Hawkins

Faculty Publications

Studies examining the effects of exposure to prosocial media on positive outcomes are increasing in number and strength. However, existing meta-analyses use a broad definition of prosocial media that does not recognize the multidimensionality of prosocial behavior. The aim of the current study is to conduct a meta-analysis on the effects of exposure to prosocial media on prosocial behavior, aggression, and empathic concern while examining multiple moderators that the prosocial behavior literature suggests are important to our understanding of why individuals voluntarily help others (e.g., target, type, coast). Results from 72 studies involving 243 effect sizes revealed that exposure to …

Go to article

The Saharan Air Layer As An Early Rainfall Season Suppressant In The Eastern Caribbean: The 2015 Puerto Rico Drought, Thomas L. Mote, Craig A. Ramseyer, Paul W. Miller Oct 2017

The Saharan Air Layer As An Early Rainfall Season Suppressant In The Eastern Caribbean: The 2015 Puerto Rico Drought, Thomas L. Mote, Craig A. Ramseyer, Paul W. Miller

Faculty Publications

No abstract provided.

Go to article

Racial Attitudes Among Asian And European American College Students: A Cross-Cultural Examination., Timothy B. Smith, Raquel Bowman, Sungti Hsu Oct 2017

Racial Attitudes Among Asian And European American College Students: A Cross-Cultural Examination., Timothy B. Smith, Raquel Bowman, Sungti Hsu

Faculty Publications

College campuses are becoming increasingly racially diverse and may provide an optimal setting for the reduction of racial stereotypes and prejudices perpetuated in society. To better understand racism among college students, this study evaluated the attitudes of Asian and White European Americans toward several racial out-groups. Participants completed a survey containing the Social Distance Scale, and differences between participants' ratings of their own race were contrasted with their ratings of other races. Findings revealed strong preferences for social affiliations with members of their same racial background, with attitudes towards out-groups differing as a function of the race of the participant. …

Go to article

Climatic History Of The Northeastern United States During The Past 3000 Years, Jennifer R. Marlon, Neil Pederson, Connor Nolan, Simon Goring, Bryan Shuman, Ann Robertson, Robert Booth, Patrick J. Bartlein, Melissa A. Berke, Michael Clifford, Edward Cook, Ann Dieffenbacher-Krall, Michael C. Dietze, Amy Hessl, J. Bradford Hubeny, Stephen T. Jackson, Jeremiah Marsicek, Jason Mclachlan, Cary J. Mock, David J.P. Moore, Jonathan Nichols, Dorothy Peteet, Kevin Schaefer, Valerie Trouet, Charles Umbanhowar, John W. Williams, Zicheng Yu Oct 2017

Climatic History Of The Northeastern United States During The Past 3000 Years, Jennifer R. Marlon, Neil Pederson, Connor Nolan, Simon Goring, Bryan Shuman, Ann Robertson, Robert Booth, Patrick J. Bartlein, Melissa A. Berke, Michael Clifford, Edward Cook, Ann Dieffenbacher-Krall, Michael C. Dietze, Amy Hessl, J. Bradford Hubeny, Stephen T. Jackson, Jeremiah Marsicek, Jason Mclachlan, Cary J. Mock, David J.P. Moore, Jonathan Nichols, Dorothy Peteet, Kevin Schaefer, Valerie Trouet, Charles Umbanhowar, John W. Williams, Zicheng Yu

Faculty Publications

Many ecosystem processes that influence Earth system feedbacks - vegetation growth, water and nutrient cycling, disturbance regimes - are strongly influenced by multidecadal- to millennial-scale climate variations that cannot be directly observed. Paleoclimate records provide information about these variations, forming the basis of our understanding and modeling of them. Fossil pollen records are abundant in the NE US, but cannot simultaneously provide information about paleoclimate and past vegetation in a modeling context because this leads to circular logic. If pollen data are used to constrain past vegetation changes, then the remaining paleoclimate archives in the northeastern US (NE US) are …

Go to article

A Fishnet-Constrained Land Use Mix Index Derived From Remotely Sensed Data, Yanqing Xu, Lei Wang, Cong Fu, Tim Kosmyna Oct 2017

A Fishnet-Constrained Land Use Mix Index Derived From Remotely Sensed Data, Yanqing Xu, Lei Wang, Cong Fu, Tim Kosmyna

Faculty Publications

Research works related to public health, transportation and urban planning have called for indices of land use mix (LUM) to support their spatial models. We propose a fishnet-based LUM calculation algorithm that works with the National Land Cover Database (NLCD) land cover data, a high-level product of Landsat satellite images. Comparing to the traditional LUM calculation, the fishnet structure can work at various spatial scales if aggregating to the administrative boundaries. Test results from regression models showed that our method was able to solve the scale problem identified as modifiable area unit problem that caused an unexpected positive correlation of …

Go to article

A Framework For Evaluating Stay Detection Approaches, Cornelia Schneider, Simon Gröchenig, Verena Venek, Michael Leitner, Siegfried Reich Oct 2017

A Framework For Evaluating Stay Detection Approaches, Cornelia Schneider, Simon Gröchenig, Verena Venek, Michael Leitner, Siegfried Reich

Faculty Publications

In recent years, sensors of mobile devices are increasingly used in the research field of Active and Assisted Living (AAL), in particular, for movement analysis. Questions, such as where users typically stay (and for how long), where they have been or where they will most likely be going to, are of utmost importance for implementing smart AAL services. Due to the plethora of application scenarios and varying requirements, the challenge is the identification of an appropriate stay detection approach. Thus, this paper presents a comprehensive framework covering the entire process from data acquisition, pre-processing, parameterization to evaluation so that it …

Go to article

Environmental Influences On Forest Fire Regime In The Greater Hinggan Mountains, Northeast China, Qian Fan, Cuizhen Wang, Dongyou Zhang, Shuying Zang Oct 2017

Environmental Influences On Forest Fire Regime In The Greater Hinggan Mountains, Northeast China, Qian Fan, Cuizhen Wang, Dongyou Zhang, Shuying Zang

Faculty Publications

Fires are the major disturbances in the Greater Hinggan Mountains, the only boreal forest in Northeast China. A comprehensive understanding of the fire regimes and influencing environmental parameters driving them from small to large fires is critical for effective forest fire prevention and management. Assisted with satellite imagery, topographic data, and climatic records in this region, this study examines its fire regimes in terms of ignition causes, frequencies, seasonality, and burned sizes in the period of 1980–2005. We found an upward trend for fire occurrences and burned areas and an elongated fire season over the three decades. The dates of …

Go to article

The Influence Of Föhn Winds On Glacial Lake Washburn And Palaeotemperatures In The Mcmurdo Dry Valleys, Antarctica, During The Last Glacial Maximum, M. K. Obryk, P. T. Doran, E. D. Waddington, C. P. Mckay Oct 2017

The Influence Of Föhn Winds On Glacial Lake Washburn And Palaeotemperatures In The Mcmurdo Dry Valleys, Antarctica, During The Last Glacial Maximum, M. K. Obryk, P. T. Doran, E. D. Waddington, C. P. Mckay

Faculty Publications

© Antarctic Science Ltd 2017. Large glacial lakes, including Glacial Lake Washburn, were present in the McMurdo Dry Valleys, Antarctica, during the Last Glacial Maximum (LGM) despite a colder and drier climate. To address the mechanism capable of generating enough meltwater to sustain these large lakes, a conceptual model was developed based on the warming potential of infrequent contemporary föhn winds. The model suggests that föhn winds were capable of generating enough meltwater to sustain large glacial lakes during the LGM by increasing degree days above freezing (DDAF) and prolonging the melt season. A present-day relationship between infrequent summer föhn …

Go to article

Religion And Esotericism Among Students: A Crosscultural Comparative Study, Franz Höllinger, Timothy B. Smith Sep 2017

Religion And Esotericism Among Students: A Crosscultural Comparative Study, Franz Höllinger, Timothy B. Smith

Faculty Publications

Analyzing the results of a study on religious and esoteric beliefs and practice among university students from five European and five American countries, we found that the level of religiousness of students depends very much on their cultural environment: the level of religiosity and esoteric beliefs is significantly higher among North- and South-American students than among European students. On the other hand, Asian spiritual techniques and esoteric methods of healing are practiced more frequently by students in North-Western European countries. In the second part of the paper, we examine the relationship between academic discipline and religious worldviews. According to our …

Go to article

A Scalable Field Study Protocol And Rationale For Passive Ambient Air Sampling: A Spatial Phytosampling For Leaf Data Collection, Tonny J. Oyana, Slawomir M. Lomnicki, Chuqi Guo, Stephania A. Cormier Sep 2017

A Scalable Field Study Protocol And Rationale For Passive Ambient Air Sampling: A Spatial Phytosampling For Leaf Data Collection, Tonny J. Oyana, Slawomir M. Lomnicki, Chuqi Guo, Stephania A. Cormier

Faculty Publications

© 2017 American Chemical Society. Stable, bioreactive, radicals known as environmentally persistent free radicals (EPFRs) have been found to exist on the surface of airborne PM2.5. These EPFRs have been found to form during many combustion processes, are present in vehicular exhaust, and persist in the environment for weeks and biological systems for up to 12 h. To measure EPFRs in PM samples, high volume samplers are required and measurements are less representative of community exposure; therefore, we developed a novel spatial phytosampling methodology to study the spatial patterns of EPFR concentrations using plants. Leaf samples for laboratory PM analysis …

Go to article

Spatiotemporal Patterns Of Childhood Asthma Hospitalization And Utilization In Memphis Metropolitan Area From 2005 To 2015, Tonny J. Oyana, Pradeep Podila, Jagila Minso Wesley, Slawo Lomnicki, Stephania Cormier Sep 2017

Spatiotemporal Patterns Of Childhood Asthma Hospitalization And Utilization In Memphis Metropolitan Area From 2005 To 2015, Tonny J. Oyana, Pradeep Podila, Jagila Minso Wesley, Slawo Lomnicki, Stephania Cormier

Faculty Publications

© 2017 Taylor & Francis Group, LLC. Objective: To identify the key risk factors and explain the spatiotemporal patterns of childhood asthma in the Memphis metropolitan area (MMA) over an 11-year period (2005–2015). We hypothesize that in the MMA region this burden is more prevalent among urban children living south, downtown, and north of Memphis than in other areas. Methods: We used a large-scale longitudinal electronic health record database from an integrated healthcare system, Geographic information systems (GIS), and statistical and space-time models to study the spatiotemporal distributions of childhood asthma at census tract level. Results: We found statistically significant …

Go to article

Invisible Outsiders: Developing A Working Alliance With Appalachian Clients, Jake Protivnak, Cassandra Pusateri, Matthew Paylo, Kyoung Choi Sep 2017

Invisible Outsiders: Developing A Working Alliance With Appalachian Clients, Jake Protivnak, Cassandra Pusateri, Matthew Paylo, Kyoung Choi

Faculty Publications

Appalachian clients are often ‘invisible’ within the majority culture and possess characteristics unique to the region that must be considered within the counseling relationship (Tang & Russ, 2007).  Individuals in Appalachia have higher incidences of certain mental health disorders and substance use as compared to the national average (Appalachian Regional Commission [ARC], 2008).  Although the need for mental health services is evident, limited research exists to inform mental health professionals how to deliver culturally competent interventions to build a working alliance with Appalachian clients.  The authors will discuss a framework for mental health professionals to develop a strong working alliance …

Go to article

A Modified Normalized Difference Impervious Surface Index (Mndisi) For Automatic Urban Mapping From Landsat Imagery, Zhongchang Sun, Cuizhen Wang, Huadong Guo, Ranran Shang Sep 2017

A Modified Normalized Difference Impervious Surface Index (Mndisi) For Automatic Urban Mapping From Landsat Imagery, Zhongchang Sun, Cuizhen Wang, Huadong Guo, Ranran Shang

Faculty Publications

Impervious surface area (ISA) is a key factor for monitoring urban environment and land development. Automatic mapping of impervious surfaces has attracted growing attention in recent years. Spectral built-up indices are considered promising to map ISA distributions due to their easy, parameter-free implementations. This study explores the potentials of impervious surface indices for ISA mapping from Landsat imagery using a case study area in Boston, USA. A modified normalized difference impervious surface index (MNDISI) is proposed, and a Gaussian-based automatic threshold selection method is used to identify the optimal MNDISI threshold for delineating impervious surfaces from background features. To evaluate …

Go to article

Parasite Biodiversity Faces Extinction And Redistribution In A Changing Climate, Colin J. Carlson, Kevin R. Burgio, Eric R. Dougherty, Anna J. Phillips, Veronica M. Bueno, Christopher F. Clements, Giovanni Castaldo, Tad Dallas, Carrie A. Cizauskas, Graeme S. Cumming, Jorge Doña, Nyeema C. Harris, Roger Jovani, Sergey Mironov, Oliver C. Muellerklein, Heather C. Proctor, Wayne M. Getz Sep 2017

Parasite Biodiversity Faces Extinction And Redistribution In A Changing Climate, Colin J. Carlson, Kevin R. Burgio, Eric R. Dougherty, Anna J. Phillips, Veronica M. Bueno, Christopher F. Clements, Giovanni Castaldo, Tad Dallas, Carrie A. Cizauskas, Graeme S. Cumming, Jorge Doña, Nyeema C. Harris, Roger Jovani, Sergey Mironov, Oliver C. Muellerklein, Heather C. Proctor, Wayne M. Getz

Faculty Publications

Climate change is a well-documented driver of both wildlife extinction and disease emergence, but the negative impacts of climate change on parasite diversity are undocumented. We compiled the most comprehensive spatially explicit data set available for parasites, projected range shifts in a changing climate, and estimated extinction rates for eight major parasite clades. On the basis of 53,133 occurrences capturing the geographic ranges of 457 parasite species, conservative model projections suggest that 5 to 10% of these species are committed to extinction by 2070 from climate-driven habitat loss alone. We find no evidence that parasites with zoonotic potential have a …

Go to article

Methods For Real-Time Prediction Of The Mode Of Travel Using Smartphone-Based Gps And Accelerometer Data, Bryan D. Martin, Vittorio Addona, Julian Wolfson, Gediminas Adomavicius, Yingling Fan Sep 2017

Methods For Real-Time Prediction Of The Mode Of Travel Using Smartphone-Based Gps And Accelerometer Data, Bryan D. Martin, Vittorio Addona, Julian Wolfson, Gediminas Adomavicius, Yingling Fan

Faculty Publications

We propose and compare combinations of several methods for classifying transportation activity data from smartphone GPS and accelerometer sensors. We have two main objectives. First, we aim to classify our data as accurately as possible. Second, we aim to reduce the dimensionality of the data as much as possible in order to reduce the computational burden of the classification. We combine dimension reduction and classification algorithms and compare them with a metric that balances accuracy and dimensionality. In doing so, we develop a classification algorithm that accurately classifies five different modes of transportation (i.e., walking, biking, car, bus and rail) …

Go to article

Parasite Biodiversity Faces Extinction And Redistribution In A Changing Climate, Colin J. Carlson, Kevin R. Burgio, Eric R. Dougherty, Anna J. Phillips, Veronica M. Bueno, Christopher F. Clements, Giovanni Castaldo, Tad A. Dallas, Carrie A. Cizauskas, Graeme S. Cumming, Jorge Doña, Nyeema C. Harris, Roger Jovani, Sergey Mironov, Oliver C. Muellerklein, Heather C. Proctor, Wayne M. Getz Sep 2017

Parasite Biodiversity Faces Extinction And Redistribution In A Changing Climate, Colin J. Carlson, Kevin R. Burgio, Eric R. Dougherty, Anna J. Phillips, Veronica M. Bueno, Christopher F. Clements, Giovanni Castaldo, Tad A. Dallas, Carrie A. Cizauskas, Graeme S. Cumming, Jorge Doña, Nyeema C. Harris, Roger Jovani, Sergey Mironov, Oliver C. Muellerklein, Heather C. Proctor, Wayne M. Getz

Faculty Publications

Copyright © 2017 The Authors, some rights reserved. Climate change is a well-documented driver of both wildlife extinction and disease emergence, but the negative impacts of climate change on parasite diversity are undocumented. We compiled the most comprehensive spatially explicit data set available for parasites, projected range shifts in a changing climate, and estimated extinction rates for eight major parasite clades. On the basis of 53, 133 occurrences capturing the geographic ranges of 457 parasite species, conservative model projections suggest that 5 to 10% of these species are committed to extinction by 2070 from climate-driven habitat loss alone. We find …

Go to article

First Prev Next Last